Power transmission

• US 3,325,149 A
• Filed: 05/17/1966
• Issued: 06/13/1967
• Est. Priority Date: 05/17/1966
• Status: Expired due to Term

• Current Assignee: Melvin H. Woodward
• Original Assignee: Melvin H. Woodward
• Inventors: Woodward, Melvin H.
• Application Number:
  US04/550,753
• Time in Patent Office: 392 Days
• US Class Current: 254/367
• CPC Class Codes: F16H 47/085 with at least two mechanical connections between the hydraulic device and the mechanical transmissions

Claims

1. FOR USE WITH APPARATUS HAVING MEANS FOR HOISTING AND LOWERING A LOAD, A POWER TRANSMISSION CONNECTIBLE TO A POWER SOURCE AND INCLUDING HOISTING AND LOWING TRAINS HAVING A COMMON OUTPUT ARRANGED FOR CONNECTION TO THE INPUT OF THE APPARATUS, THE HOISTING TRAIN INCLUDING IN SERIES FLOW RELATION A HYDRAULICALLY CONTROLLED FRICTION CLUTCH FOR PROVIDING CONNECTION WITH THE POWER SOURCE, A SINGLE STAGE, ROTATING HOUSING, HYDRAULIC TORQUE CONVERTER HAVING AN IMPELLER AND A TURBINE AND THE COMMON OUTPUT, AND THE LOWERING TRAIN INCLUDING IN SERIES FLOW RELATION A REVERSE GEAR TRAIN CONNECTED TO THE POWER SOURCE AND THE COMMON OUTPUT, AND MEANS FOR RECOVERING CONTROL OF AND BRINGING A LOWERING LOAD TO A STOP POSITION BY ENGAGING THE FRICTION CLUTCH INCLUDING A GEAR RATIO IN THE REVERSE GEAR TRAIN ADAPTED TO ESTABLISH A NEGATIVE SPEED RATIO NOT GREATER THAN THAT AT WHICH THE OUTPUT TORQUE OF THE CONVERTER IS GREATER OR EQUAL TO ITS STALL TORQUE WHEN THE FRICTION CLUTCH IS ENGAGED, AND MEANS FOR ANCHORING A PART OF THE REVERSE GEAR TRAIN TO LIMIT THE LOWERING SPEED OF THE OUTPUT TO THE SPEED OF THE POWER SOURCE.